Steps
1. Heat vegetable oil in a pan over medium-high heat.
2. Add minced garlic and sauté for 30 seconds until fragrant.
3. Add sliced beef and cook until browned on all sides, about 3-4 minutes.
4. Stir in soy sauce, brown sugar, black pepper, and water.
5. Simmer the mixture for 2-3 minutes until the sauce thickens slightly.
6. Add scallions and cook for another minute until they soften but remain crisp.
7. Serve hot over steamed rice if desired.